Heat exchanger and refrigeration apparatus

Abstract

A heat exchanger is provided in a refrigeration apparatus (R) configured to be capable of performing a refrigeration cycle where an evaporation pressure of a refrigerant is lower than an atmospheric pressure. The heat exchanger functions as an evaporator. The heat exchanger includes a shell (20) forming an internal space (21). The heat exchanger includes a plate stack (40) arranged in the internal space (21) and including a plurality of heat transfer plates (50a, 50b).

1 . A heat exchanger that is provided in a refrigeration apparatus (R) configured to be capable of performing a refrigeration cycle where an evaporation pressure of a refrigerant is lower than an atmospheric pressure, and that functions as an evaporator, the heat exchanger comprising:
 a shell ( 20 ) forming an internal space ( 21 ); and   a plate stack ( 40 ) arranged in the internal space ( 21 ) and including a plurality of heat transfer plates ( 50   a,    50   b ).   
     
     
         2 . The heat exchanger of  claim 1 , wherein
 the heat exchanger is provided in the refrigeration apparatus (R) configured to be capable of performing a refrigeration cycle where the evaporation pressure of the refrigerant at 0° C. or more is lower than the atmospheric pressure.   
     
     
         3 . The heat exchanger of  claim 2 , wherein
 the heat exchanger is provided in the refrigeration apparatus (R) using 1-chloro-3,3,3-trifluoropropene as the refrigerant.   
     
     
         4 . The heat exchanger of  claim 1 , wherein
 a pitch P between the plurality of heat transfer plates ( 50   a,    50   b ) is more than 1.2 mm.   
     
     
         5 . The heat exchanger of  claim 4 , wherein
 the pitch P is 1.5 mm or more.   
     
     
         6 . The heat exchanger of  claim 5 , wherein
 the pitch P is 2.1 mm or less.   
     
     
         7 . The heat exchanger of  claim 1 , wherein
 a surface of the heat transfer plate ( 50   a,    50   b ) has a rough portion ( 80 ).   
     
     
         8 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 1 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         9 . The heat exchanger of  claim 2 , wherein
 a pitch P between the plurality of heat transfer plates ( 50   a,    50   b ) is more than 1.2 mm.   
     
     
         10 . The heat exchanger of  claim 3 , wherein
 a pitch P between the plurality of heat transfer plates ( 50   a,    50   b ) is more than 1.2 mm.   
     
     
         11 . The heat exchanger of  claim 9 , wherein
 the pitch P is 1.5 mm or more.   
     
     
         12 . The heat exchanger of  claim 10 , wherein
 the pitch P is 1.5 mm or more.   
     
     
         13 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 2 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         14 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 3 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         15 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 4 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         16 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 5 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         17 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 6 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.   
     
     
         18 . A refrigeration apparatus comprising:
 the heat exchanger ( 10 ) of  claim 7 ,   the refrigeration apparatus being configured to be capable of performing the refrigeration cycle where the evaporation pressure of the refrigerant is lower than the atmospheric pressure.